Notice Scotsman is hard to censure? (8)
I believe the answer is:
admonish
'censure?' is the definition.
(I've seen this before)
'notice scotsman is hard' is the wordplay.
'notice' becomes 'ad' (short for advert).
'scotsman' becomes 'mon'.
'hard' becomes 'h' (abbreviation used in pencil classifications).
'ad'+'mon'+'is'+'h'='ADMONISH'
'to' acts as a link.
(Other definitions for admonish that I've seen before include "Scold, wag the finger at" , "Warn sternly" , "Firmly reprimand" , "Mildly reprove" , "Gently reprove" .)